Hi Tom, sounds interesting. I have been thinking if MS Photosynth could model a building from such 50% overlapping images for panoramas?
Would be awesome if one could the nmeasure the model of the building. Jan On Mon, Dec 6, 2010 at 8:28 PM, Tom Sharpless <tksharpl...@gmail.com> wrote: > Hey Terry, I still think there is a market for a convenient tool of > this kind. I know a commercial plumbing contractor who would love to > measure spaces with photos rather than a tape measure -- 1/8 inch > error per 30 feet would be sufficient, that's about 0.02 degrees. > > Jan: All you can do from a single point of view is measure angles > around that point. Bur a pano should give more accurate angles than a > single photo, since the alignment process involves at least partially > correcting lens errors. Indeed, a 360 degree pano with 50% overlap > and lots of control points might achieve accuracy in the 0.02 degree > range without any additional lens calibration (provided there is no > wobble in your pano head, lens does not shift on mount or change > focus, etc, etc). > > Two or more such panos taken from different points of view could give > you a bunch of good triangulations. Then by measuring just one actual > distance you can compute all the others. > > -- Tom > > > > > > On Nov 24, 9:54 pm, Tduell <tdu...@iinet.net.au> wrote: > > Hullo Jan, > > > > On Nov 25, 11:50 am, Jan Martin <janmar...@diy-streetview.org> wrote: > > > > [snip] > > > > > If one knows the size of a single object, e.g. of a car, in a digital > image, > > > one should be able to measure anything else in it. IS this true for > panos > > > to? > > > > I don't think that is possible without having a stereo pair and some > > real world 3d coordinates of control objects in the image. > > The problem is that a normal digital image, and a derived pano are > > only 2D, and while you will be able to a measure relative sizes of > > objects on the 2D plane of the image, you don't have the info to know > > where the objects are in the 3rd dimension, hence could a small object > > close, or a large object further away. > > > > Cheers, > > Terry > > -- > You received this message because you are subscribed to the Google Groups > "Hugin and other free panoramic software" group. > A list of frequently asked questions is available at: > http://wiki.panotools.org/Hugin_FAQ > To post to this group, send email to hugin-ptx@googlegroups.com > To unsubscribe from this group, send email to > hugin-ptx+unsubscr...@googlegroups.com<hugin-ptx%2bunsubscr...@googlegroups.com> > For more options, visit this group at > http://groups.google.com/group/hugin-ptx > -- http://www.DIY-streetview.org -- You received this message because you are subscribed to the Google Groups "Hugin and other free panoramic software" group. A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ To post to this group, send email to hugin-ptx@googlegroups.com To unsubscribe from this group, send email to hugin-ptx+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/hugin-ptx
